Method of heating billets.



m on M r 1 i 1 .m. I I w i B n s .0 D B T H mm A N. P E Lm L mun t mm 1* J...- PH um a, m I A" 3 m I 9 a 0 x in amass lu rsudoltheheatingcharnhsr the scribed. various parts oi the burner are supported in suitable masonry work It built al u a box-like platform B made of steel pl a t sandreatingu npcatsB'. lutlua inaaonry,nsarwhere tabutsagainatthecnd ottheiurnacestmcturep .r,u rovideda narrowverticalpassageor t8, igs.land

1s 2,and8and9. Atitalowerend communicates with a similar thispama or t 8 disposed at roxbnate at angles theretml" .l 8, ando pznilralwits entire le into the forward M the so heating chamber A, F's: 5 and 6. Aaahown in l and 8, thh t has a aligh ward ination horn the line of its junction with thcverticalalotS soaatobeonaline, been audauhatantiall ,withthesltid ipes as which the ta are advanced. A vs the ts'inalinaparallaltharewithisapee ries of apertures 8', communicating with vertical slot 8 and downwardly inclined therelrom,FQa.1,5a:d8. t 80 Gas is admitted to t e Eassage S through suitable nosalea emb edde in m my work )1 and connected with the sup l ,main 3. When natural gas is employed ave found it advantageous to employ a plurality of such as noaaleasmounted int .manner clearly indicatodin l'lge. l and 2. Where, however, the

anroduct is med, a single large nozale a of form shown in Figs. 8 and 0 gives their results. The burner is designed with 40 a new to facilitate the removal of one style of nozzle and tho substitution of the other to meet the exigencies that i uently arise in the supply of gaaeous fuel. us it is merelv necessary to remove from the ho; platform 13 48 the masonry M inclosing one type of humor and to erect the other in its place, the turnaec structure being undisturbed;

air required to form a eomlnmtiblo mixture with. the is admitted to alot S" to through alot S. be detaila of such air suply comprise a closed, laterally elongated nnel or hopper structuna tilted into the outer opening of slot 8. Connected there- -with are airsupply pipes H through which the is air in forced under suitable preasum. 'lhese pipes S, ol which there are preferably two, as shown, lie for a portion of their ooume within heating chamber A, being conveniently dispmed between the side walls of such 00 chamber and outer dwarf walls a, Figs. 2 and it. By this arrangement of the pipes, instead of embedtlin them within the walls or thior toundation oi the furnace as has heretofore been the iraetiei', they are rendered on readily aetwsaih e for the lttltltmtt' of making on being admitted one the iihambe'r in new arranged as hereinatter da- 0! tdownotthe alterations or repairs. The are at the same time ex l to the heat of t iurnaee chamber an the air is thus raised to the proper I temperature. without the em loyment of exraneoua ting means. etTaet ot the nnel or per a is to render the pressure the bra air. thus forced into the burner. umltgm ae msa the entire length of vertical Front the-manor in which horirmttal alot 8' and agert S are connected with vertical slot it is evident that only a portion of the arr wilLhe forced down the entire length of such slot 8 to mingle with the gas from nosales s or no a, to thenee escape through slot 8' and be ignited. The size of the openings provided for the passage of the gas and air must be proportioned with the pressures em I ed ao as to produee'a pro crly cornbna b mixture. The remainder air escapes into the heating chamber through the apertures S situated, as has ex lained, above the opening of horiaontals t8.

It is to the cllect reduced by the admisaion of the air above ha ua mix-- ture issuing from slot 8' to whie l I desire to call partic arattention. Such incandescent u gases are discharged in a downward direr.

tion, b virtue of the downward inclination of slot so an to parts below a well as above the billets as they advaneo along the dwarf walls a. The tendency, however, of heated vapors to rise would cause the hottest portions of such gases, as soon an the ell'oet of the initial downward discharge waa lost, to flow alon the eei'ling of the chamber instead nl aroum the billets, and much of the heating etl'ett would thus be wasted. l have found that thc intrmluction of a blast of air just below the veiling of the chamber and above this blast of incandescent gases, very eli'eetivoly blankets anddirects the latter and, by preventing their rising, prolongs their eontinement. to the lower iortion oi the ehnmber. Sueh a blast of air produro by the emplo ment of apertures S, the ell'eet being heig rte-nod by having the air at a high enoughtemperature to prevent its having an undue cooling ell'eet and by also importing to it an initial downward direetion. The heat produeed by the combustion of the fuel is thus utilized to the fullest extent. and the economy thus elleeled in the tlllt'l'llllflll of u reheating furnace is a very impm-tant item in the operation of steel rolling mills,

Having thus described my invention in detail, that Wlllt'll l pmtieularly point outand distinctly t'lltllll is:

l. The method of heating billets and the like, which ("minister in atlvnneing the some through a furnaee-elnnnlwr; in dist-barging into said elounlmr in a downwardly lllt'llllttl diret-tion a blast of igneous vapors. and eonveying a blast. of heated notm-ombu-oiblo sbov'a such blast and in a-downwarilly mwas under rrssurv to said chamber so that t it will exton ,nlmvo said first. nanwd blast in i order to blanket and direct same to tho lower-l portion of th furnace-chamber. l

2. The mo. ml of heating billets and he like, which cmsists in ndrunviog the'snmo through a In uco-clrmnlwr in one dirvotion and in disc-ha 'ing into said ('lmmlmr in the i op ito' :nd ownwardly inclined direction u but of oommingled igneous vapom, and

clinod directi n 5 second blast. of heated nonoombuatible gases tinder )rooaure sothat tlm' utter will xmml above t m that named blast in order to blnnket and direct same to the mgrtlon of the ammo-chamber.

8. mpthod of heating billet: and tlm M nomiata in adnncinn the me through the lower portion of n furnace-chumlmr in mm duovlnm and dhwhargnu; in u Mud vluunlmr m the opposite and downwardly m clinod direction blast made up of iguiu-d CARL J. F. JOHNSON Attcstcdb 1).1. ulna, J no. F. Onnux. 

